{
  "manageEntity": {
    "action": "Save",
    "entityId": "2132313156",
    "entityType": "Track",
    "nonce": "0xa14db2a8a745ad8bf830b84597b799158575924aa099e0149d51326807585f47",
    "signature": "0xfb6ea29801f48e9f1fc9a64bb5433f14362121f11d77e9138d2b3f32a0e50fb765294de0e32c7bec11e4def96ace76452365b852fc8c56ba128f3e285512b6381c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}